When is the use of a BVM most effective?

The use of a Bag-Valve-Mask (BVM) is most effective when utilized by two responders. In this collaboration, one responder manages the BVM to deliver positive pressure ventilation, while the second responder maintains an open airway and seals the mask against the patient's face. The teamwork ensures that the ventilation is effective and provides a proper seal, which is essential for delivering adequate oxygenation to the patient.

When only one responder is available, it can be challenging to achieve a proper mask fit and maintain a patent airway at the same time, leading to inefficient ventilation. Additionally, using a BVM on a conscious patient is generally not indicated, as they are able to ventilate themselves and may not tolerate the mask comfortably. The BVM is most necessary in situations where the patient is not breathing adequately or is apneic, making the two-responder approach the optimal choice for effective ventilation.